Electric motor



(No Model.)-

' M. H. GOLLOM.

ELECTRIC MOTOR.

Ia-464,063. Patented Dee. V1, 189.1.

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UNITED vSTATE-s PATENT OFFICE.

MARTIN H. COLLOM, OF DENVER, COLORADO.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent N o. 464,063, datedDecember I, 1891. Application filed January 27, 1891. Serial No.379,257. (No model.)

To all whom it may concern:

Be it known that I, MARTIN H. CoLLoM, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of Colorado,have invented certain new and useful Improvements in Electric Motors;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to electric motors, and particularly to thatclass which operate continuously without any reciprocatory oroscillatory motion.

The object of the invention is to obtain the maximum amount of availableforce from a given amount of electric energy and apply the same in aneconomic manner.

A further object of the invention is to provide a motor of a givencapacity that can have its efciency increased or diminished at willwithout an increase of current or an increase of wire, and which willpossess all the advantages gained by varying the size ofthe armature inan electric motor of usual construction, the electrical force remainingthe same. p

The improvement consists of a solenoid and an endless core, the latterbeing composed ot' alternate magnetic and non-magneticsections andprovided with brushes at proper intervals, which arein electricalconnection with a conductor in the core and which serve to close thecircuit through the solenoid at the right moment. The solenoid may becomposed of a series of independent sections, which are electricallyinsulated, or comprise a number of separate solenoids which arejuxtaposited. One terminal of the wire of the solenoid is in electricalconnection with a metal plate or contact-strip placed within the saidsolenoid to be engaged by the brush on the endlesscore to complete thecircuit, and the otherterminal is connected with one pole of the batteryor dynamo. The endless-core conductor is in connection with the otherpole of the said battery or dynamo.

The improvement also consists ofthe novel features and the peculiarconstruction and combination of the parts, which will be hereinaftermore fully described and claimed, and

which are shown in the annexed drawings, in which Figure l is a frontView, parts being broken away, of a motor embodying my'invention. Fig. 2is a detail view of a portion of the endless core. Fig. 3 is a detailView of a portion of a modified form of endless core.

The solenoid A is of usual construction, being formed on a tubularcenter, and is preferably composed of a series of sections orindependent solenoids B B B, which are j uxta posed and in alignment,the sections or solenoids being insulated from each other at theiropposing ends. The terminals a aa of the solenoid-sections B B B uniteWithvone common conductor at n, by means of which they are connectedwith one pole ot' a battery or dy-L namo in the usual manner. The otherterminais a are connected with contact-strips C, which are locatedwithin the solenoid, one being provided for each section or separatesolenoid within the path of the brush D on the ende less core E. Thesecontact-strips C extend axially of the solenoid or sections thereof aproper distance, preferably'the entire length of each section orseparate solenoid.

The endless core E is composed of a series of magnetic and nonmagneticsections F and G, respectively, which are preferably of a length aboutequal to the length of a section or separate solenoid B, and passes overtwo pulleys H and l, one of which pulleys is connected electrically withthe other pole of the battery or dynamo by the conductor S. The endlesscore E may be composed of metallic links after the fashion of anyordinary drivechain, as shown in Fig. :2, the links being as senibled toform alternate magnetic and nonm agnetic sections. The links of themagnetic sections are made from iron or other magnetic substance, andthe links of the non-magnetic sections are formed from brass or othernonmagnetic material. Obviously in this form of core the sections F andG are electric conductors and obviate the intervention of other meansfor conducting the current from the pulley l to the brushes D, thelatter being attached to the said links in any convenient manner.

In the form of core shown in Fig. 3 the magnetic and the non magneticsections are IOO mounted on wires J and comprise strips K, of iron orother magnetic material,and strips L, of leather, rubber, or othernon-magnetic substance. The strips K are separated by strips L, ofrubber or leather, to give sutlicient iiexibilityto the core to enableit .to pass freely and readily over the pulleys. The brushes D areattached to the magnetic strips. Ob` viously the wires J form conductorsto complete the circuit through the solenoid.

There may be one or moreI solenoids A, and in the event of two beingemployed they will be disposed at diametrically-opposite points, asshown in the accompanying drawing.

l The operation is manifest to one skilled in the art from the foregoingdetailed description, reference being had to the drawings. However, itmay be well to state that the brushes are so disposed with reference tothe solenoid and the core that the circuit is closed through thesolenoid or a section thereof at or about the instant the magneticsection is en-tering the said solenoid or section, and the circuit isinterrupted through the said solenoid or section about the time themagnetic section of the core is emerging therefrom at the end oppositethat at which it entered. The direction of the motor is reversed bychanging the position of the brushes and placing them at the oppositeend of the magnetic sections. The power is taken from one of the pulleysor the shafts on which the pulleys are mounted.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

' l. An electric motor comprisinga solenoid and an endless 'core formingan electrical conductor to convey the current to and adapted to completethe circuit through the said soleiloid, substantially as described.

2. An electric motor comprisingasolenoid, the latter composed of aseries of sections or separate solenoids in juxtaposition, and anendless core composed of a series of magnetic and non-magneticsect-ions, said endless core being an electrical conductor and adaptedto convey the current to and complete the circuit through the saidsections or series of solenoids, substantially as and for the purposeset forth.

.3. The combination, with a solenoid having a contact in the plane ofits core-opening and having one terminal of its wire in electricalconnection with the said contact and the other terminal connected withone pole of a current-generator, of an endless'core provided withbrushes which are'in electrical connection with the other pole of thesaid currentgenerator, substantially as and for the purpose described.

4. The combination, with a solenoid having a contact in the plane of itscore-opening and having one terminal of its wire connected with the saidcontact and the other terminal in electrical connection with one pole ofa current-generator, of an endless core composed of a series of magneticand non-magnetic sections, the magnetic sections being in electricalconnection with the other pole of the said current-generator,substantially as set forth.

5. The combination, with the solenoid having one terminal of the wire inelectrical conneclion with a pole of the current-generator and havingthe other terminal within the plane of the core-opening, of au endlesscore composed of an alternate series of magnetic and non-magneticsections and provided with brushes at properintervals in its lengthwhich are electrically connected through the core with the other pole ofthe said current-generator, and which close the circuit through thesolenoid when in engagement with the said contact, substantially asdescribed.

6. The combination, with a solenoid composed of a series of independentsections or separate solenoids, each section or separate solenoid havingone terminal in electrical connection with a contact which is in theplane of the core and its other terminal in electrical connection withonepole of a current-generator, of an endless core composed of a seriesof magnetic andnon-magnetic sections and provided with brushes Which areelectrically connected with the other pole of the current-generator andclose the circuit through the said sections or separate solenoidsconsecutively, substantially as described, for the purpose specified.

In testimony whereof I affix my signature in presence of two witnesses.

` MARTIN itmcoLLoM.

NVitnesses:

ORLANDO KLING, FRANK L. WooDwARD.

IOO

